Rajib Dey rajibkuet07

Common Terminal Commands

Before we look at some common commands, I just want to note a few keyboard commands that are very helpful:

$ mkdir test

$ cd test

Create a database table for the retry events - id, topic, partition, message, hash(md5(the unique identifier for the failed message)), offset, counter(count of retry for this message), nextEventTime(DateTime | gradually increase based on the counter), published(false | true whether or not a retry message is published in the topic again), handled(false | true whether the message handled again), status(success | error status of the event when handled again)
When an error happens in any consumer emit an event to the retry topic. The retry topic can get a message consisting of hash(md5(the unique identifier for the failed message), topic(topic name of the failed message), partition(partition number of the failed message), message(actual message of the failed message), error(error data or string for which the previous message failed), fallback(optional | {topic: "fallback topic name", value: "fallback message value"} | if max count exceeds then produce this fallback topic with the

	// check version
	node -v \|\| node --version

	// list locally installed versions of node
	nvm ls

	// list remove available versions of node
	nvm ls-remote

	// install specific version of node

	import {
	ArgumentsHost,
	Catch,
	ExceptionFilter,
	HttpStatus,
	Logger,
	} from '@nestjs/common';
	import { HttpArgumentsHost } from '@nestjs/common/interfaces';
	import { RpcException } from '@nestjs/microservices';
	import { status as Status } from '@grpc/grpc-js';

	INSERT INTO `urls`
	(`id`,`linkId`,`userId`,`target`,`type`,`order`,`active`,`name`,`createdAt`,`updatedAt`)
	VALUES
	(2,2,1,'https://example.me',NULL,1,true,'','2024-03-18 15:47:03','2024-03-18 15:47:03'),
	(3,2,1,'https://example-1.com',NULL,2,true,'Test note Updated','2024-03-18 15:47:03','2024-03-18 15:47:03'),
	(4,2,1,'https://example-2.com',NULL,3,true,'Another Note Updated','2024-03-18 15:47:03','2024-03-18 15:47:03'),
	(7,2,1,'https://example-3.com',NULL,4,true,'A New Note','2024-03-18 15:47:03','2024-03-18 15:47:03'),
	(NULL,2,1,'https://example-4.com',NULL,5,true,'A New Item Note','2024-03-18 15:47:03','2024-03-18 15:47:03')
	ON DUPLICATE KEY UPDATE
	`target`=VALUES(`target`),

	import axios from 'axios';
	import path from 'path';

	function extractFilenameAndExtension(url: string): {
	fileName: string;
	extension: string;
	} {
	/* Works Only For Absolute URL */
	// // get the pathname from the URL
	// const pathname = new URL(url).pathname;

	function isAbsoluteUrl(url: string): boolean {
	/* Using URL construcor */
	try {
	new URL(url);
	return true;
	} catch {
	return false;
	}

	/* Using Regex */

	/* Check if an url is an image url in browser */
	async function isImgUrl(url: string) {
	const img = new Image();
	img.src = url;
	return new Promise((resolve) => {
	img.onerror = () => resolve(false);
	img.onload = () => resolve(true);
	});
	}

	import crypot from crypto;

	export const md5 = (value: any): string => {
	return crypto.createHash('md5').update(value).digest('hex');
	};